needsParen = true
				}
			}
		}
		if needsParen {
			ps.startScope('(')
		}

		ps.print(a)

		if needsParen {
			ps.endScope(')')
		}

		first = false
	}
}

// startScope starts a scope. This is used to decide whether we need
// to parenthesize an expression using > or >>.
func (ps *printState) startScope(b byte) {
	ps.scopes++
	ps.writeByte(b)
}